RTD temperature sensor MT2

Pt1000RS-485Modbus RTU

Summary
The Atonometrics MT2 is a digital PV temperature sensor providing high‑accuracy back‑of‑module and ambient temperature measurements via Modbus RTU over RS485, suitable for performance ratio and solar panel efficiency analysis.

Overview
The MT2 (810324-01) is a compact Modbus digital temperature transmitter compatible with Pt1000 RTDs. It supports both back‑of‑module and ambient air temperature measurement using 3‑wire Pt1000 probes, allowing flexible installation on PV modules or in the surrounding environment.
The unit features an IP67 enclosure for outdoor operation and delivers temperature data over Modbus RTU (RS485) for straightforward integration into SCADA and monitoring systems. Its compact form factor and integrated mounting options enable fast installation in PV arrays and environmental monitoring setups.

Technical attributes
Measurement range: -40 to 100 °C
Input voltage: 10-30 VDC
Input power: <5 mA typical
Accuracy: IEC 60751 Class A, ± (0.15 + 0.002t) °C
Stability: IEC 60751 Class A
Cable connection: M8 connector
Cable length: 3 m standard
Communication protocol: Modbus RTU over RS485
Dimensions: 90 x 45 x 26 mm (3.5 x 1.8 x 1.0 in)
Ingress protection: IP67

Specifications

• Measurement range: -40 to 100 °C
• Sensor type / input: Pt1000 RTD (3-wire)
• Communication: Modbus RTU over RS485
• Accuracy / Class: IEC 60751 Class A, ± (0.15 + 0.002t) °C
• Power: 10-30 VDC, <5 mA typical
• Cable connection: M8 connector; cable length 3 m (standard)
• Enclosure rating: IP67 for outdoor operation
• Dimensions: 90 x 45 x 26 mm (3.5 x 1.8 x 1.0 in)